.banner{
    width: 520px;
    height: 304px;
    margin: 1em auto;
    overflow: hidden;
    position: relative;
}

.banner .imgs{
    width: 1560px;
    height: 304px;
}

.banner .imgs img{
    width: 520px;
    height: 304px;
}

.banner .imgs a{
    float: left;
}

.banner .left, 
.banner .right{
    position: absolute;
    width: 50px;
    height: 50px;
    line-height: 50px;
    color: #fff;
    font-size: 3em;
    top: 0;
    bottom: 0;
    margin: auto;
    text-align: center;
    font-family: Arial;
    border-radius: 50%;
    cursor: pointer;
}

.banner .left:hover, 
.banner .right:hover{
    background: #fff;
    color: red;
}

.banner .left{
    left: 20px;
}

.banner .right{
    right: 20px;
}

.banner .modal{
    width: 100%;
    height: 40px;
    line-height: 40px;
    background: rgba(129, 76, 76, 0.3);
    position: absolute;
    left: 0;
    bottom: 0;
    color: #fff;
    padding: 0 20px; 
    box-sizing: border-box;
}

.banner .modal .title{
    float: left;
    font-weight: bold;
}

.banner .modal .dots{
    float: right;
}

.banner .modal .dots li{
    width: 8px;
    height: 8px;
    background: #ccc;
    border-radius: 50%;
    display: inline-block;
    margin: 0 2px;
    cursor: pointer;
}

.banner .modal .dots li:hover{
    background: #369;
}